[url removed, login to view] redirect - Quick FIx

I had a developer build a custom CMS a while ago. When launching the site on it's official domain, I pointed the domain at my server and the website only came up under [url removed, login to view] The rest of the pages gave an Internal Error/Misconfiguration.

The site is back to it's old server because I could not get it to work and the original developer isn't responsive. This issue should be a quick fix, just need someone who is familiar with this.

At SoftWeb Technology we offer a full suite of web application development under one roof: web site design, e-commerce application, i phone apps, process automation, web application development, programming and hostingMore

Greetings,
I cannot accurately bid on this project until I know what operating system is in use on the server, and also what web server you are using. Also I need to know if you are on a shared server using a "contrMore